Adding tinyMCE.init option

I'm trying to install the jSpell Evolution module on my server, which works fine stand alone.

To get it to work with drupal I have to add

function postTinyMCEInit() {
 
  setTimeout(jspellInit,500);
 
};
 
tinyMCE.init({
 
  oninit : "postTinyMCEInit"
 
});

Is this something that can be done with the WYSIWYG API module? Its not really a plugin so I wasn't sure if the documentation that applies for them would apply.